Coffee machine



FIG. 1 is a front perspective view of the present coffee machine.

FIG. 2 is a right side view of FIG. 1.

FIG. 3 is a left side view of FIG. 1.

FIG. 4 is top view of FIG. 1.

FIG. 5 is a front view of FIG. 1; and,

FIG. 6 is a rear view of FIG. 1. 

The ornamental design for a coffee machine, as shown and described. 